Array substrate, method for controlling the same, and display device

ABSTRACT

The present disclosure provides an array substrate, a method for controlling the same, and a display device. The array substrate comprises: a base substrate; and an array of first thin film transistors, a signal line array, a photosensor array and a receiving line array, each provided on the base substrate. Each first thin film transistor in the array of first thin film transistors is connected to one signal line of the signal line array. Each photosensor in the photosensor array is connected to one signal line in the signal line array and one receiving line in the receiving line array.

CROSS-REFERENCE TO RELATED APPLICATION(S)

This application is a Section 371 National Stage application ofInternational Application No. PCT/CN2017/115592, filed on 12 Dec. 2017,which has not yet published and claims priority to Chinese PatentApplication No. 201710434368.2, filed on Jun. 9, 2017, the contents ofwhich are incorporated herein by reference in their entirety.

TECHNICAL FIELD

The present disclosure relates to the field of display technologies, andmore particularly, to an array substrate, a method for controlling thesame, and a display device.

BACKGROUND

Devices or elements for realizing various functions, such as aphotosensor array for acquiring optical information and the like, may beintegrated in an conventional array substrate. However, in such an arraysubstrate, an aperture ratio of the array substrate may be affected dueto the presence of the integrated devices and lines.

SUMMARY

Embodiments of the present disclosure provide a display panel, a methodfor controlling the same, and a display device. According to a firstaspect of the present disclosure, there is provided an array substrate,comprising: a base substrate; and an array of first thin filmtransistors, a signal line array, a photosensor array and a receivingline array, each provided on the base substrate. Each first thin filmtransistor in the array of first thin film transistors is connected toone signal line in the signal line array, and each photosensor in thephotosensor array is connected to one signal line in the signal linearray and one receiving line in the receiving line array.

In an embodiment, lenses are provided on at least one photosensor in thephotosensor array on a side thereof away from the base substrate, so asto form a lens array.

In an embodiment, each of the lenses is selected from a micro-lensarray, a Fresnel lens or a liquid crystal lens.

In an embodiment, in a case that the lenses are liquid crystal lenses,each of the liquid crystal lenses comprises a liquid crystal layer and acontrol electrode configured to control a focal length of the liquidcrystal lens.

In an embodiment, the liquid crystal lenses are provided on a lightexiting side of the array substrate.

In an embodiment, each photosensor in the photosensor array comprises asecond thin film transistor and a photoelectric converter, wherein thesecond thin film transistor has a gate connected to the signal line anda negative electrode of the photoelectric converter, a first electrodeconnected to a positive electrode of the photoelectric converter, and asecond electrode connected to the receiving line.

In an embodiment, the second thin film transistor comprises an activelayer. The base substrate has a base layer, the active layer, a firstinsulating layer, a second insulating layer and a third insulating layerprovided thereon in an order from bottom to top, wherein the firstinsulating layer and the second insulating layer have a first via holeprovided therein, the second insulating layer has a second via holeprovided therein, the first insulating layer, the second insulatinglayer, and the third insulating layer have a third via hole providedtherein, and orthogonal projections of the first via hole, the secondvia hole and the third via hole on the base substrate are all within arange of an orthogonal projection of the active layer on the basesubstrate. The gate is provided in the second via hole, and thephotoelectric converter is provided on the gate, the first electrode isprovided on the second insulating layer and is electrically connected tothe active layer through the first via hole, the second electrode isprovided in the third via hole and is electrically connected to theactive layer, and the receiving line is provided on the third insulatinglayer and is electrically connected to the second electrode through thethird via hole, wherein the receiving line and the second electrode areformed by the same patterning process.

In an embodiment, the first electrode is made of a transparentconductive material.

In an embodiment, an ohmic contact layer is further formed at a positionwhere at least one of the first electrode and the second electrode is incontact with the active layer.

In an embodiment, the base substrate further comprises a data line arrayprovided thereon, wherein an arrangement direction of receiving lines inthe receiving line array is parallel to an arrangement direction of datalines in the data line array or an arrangement direction of signal linesin the signal line array.

In an embodiment, the array substrate is divided by the signal lines andthe data lines into a plurality of sub-pixel regions in a crisscrossmanner, wherein a number of photosensors in the photosensor array isless than or equal to a number of the sub-pixel regions.

In an embodiment, the photosensor array comprises a preset number ofphotosensors.

In an embodiment, a photosensor is provided in every n sub-pixel regionsalong at least one of the arrangement direction of the data lines andthe arrangement direction of the signal lines, where n is an integergreater than or equal to 2.

In an embodiment, the photosensor array is located in an opening regionof the array substrate.

According to a second aspect of the present disclosure, there isprovided a method for controlling an array substrate, which is used forthe array substrate according to the first aspect, the methodcomprising: controlling, through the signal lines, the photosensors tobe turned on; receiving, through the receiving lines, electrical signalsgenerated by the photosensors; and acquiring optical informationaccording to the electrical signals.

In an embodiment, the step of controlling, through the signal lines, thephotosensors to be turned on comprises: controlling, through voltages inthe signal lines, the photosensors to be turned on while controlling,through the voltages, the array substrate to be used for display.

In an embodiment, the step of acquiring optical information according tothe electrical signals comprises:

screening out at least one valid electrical signal from the electricalsignals acquired through various receiving lines, wherein a voltage ofthe valid electrical signal is greater than a voltage of a correspondingsignal line;

acquiring a standard value φ of each valid electrical signal accordingto the following formula:

${\varphi = \frac{V_{p} - V_{g}}{V_{g}}},$where V_(p) is the voltage of the valid signal and V_(g) is the voltageof the signal line; and

acquiring the optical information according to the standard value of thevalid electrical signal.

According to a third aspect of the present disclosure, there is provideda method for manufacturing an array substrate, which is used tomanufacture the array substrate according to the first aspect.

According to a fourth aspect of the present disclosure, there isprovided a display device, comprising the array substrate according tothe first aspect.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS

In order to more clearly illustrate the technical solutions in theembodiments of the present disclosure, the accompanying drawings used inthe description of the embodiments will be briefly described below. Itis obvious that the accompanying drawings in the following descriptionare only some embodiments of the present disclosure. Other accompanyingdrawings may also be acquired by those of ordinary skill in the artaccording to these accompanying drawings without any creative work.

FIG. 1 is a schematic structural diagram of an array substrate accordingto an embodiment of the present disclosure;

FIG. 2-1 is a schematic structural diagram of another array substrateaccording to an embodiment of the present disclosure;

FIG. 2-2 is a schematic structural diagram of another array substrateaccording to an embodiment of the present disclosure;

FIG. 2-3 is a schematic structural diagram of another array substrateaccording to an embodiment of the present disclosure;

FIG. 2-4 is schematic structural diagram of another array substrateaccording to an embodiment of the present disclosure;

FIG. 2-5 is schematic structural diagram of another array substrateaccording to an embodiment of the present disclosure;

FIG. 2-6 is schematic structural diagram of another array substrateaccording to an embodiment of the present disclosure;

FIG. 2-7 is a schematic circuit diagram of the array substrate shown inFIG. 2-6;

FIG. 2-8 is a response curve of the photoelectric converter in theembodiment shown in FIG. 2-1 to current and a voltage;

FIG. 3-1 is a flowchart of a method for controlling an array substrateaccording to an embodiment of the present disclosure;

FIG. 3-2 is a flowchart of acquiring optical information according to anelectrical signal in the embodiment shown in FIG. 3-1; and

FIG. 3-3 is a schematic diagram of level signals on signal lines, datalines, and receiving lines in the embodiment shown in FIG. 3-1.

The embodiments of the present disclosure have been shown by the aboveaccompanying drawings, and will be described in more detail later. Theaccompanying drawings and the text description are not intended to limitthe scope of the present disclosure in any way, and are intended toconvey the concepts of the present disclosure to those skilled in theart by referring to specific embodiments.

DETAILED DESCRIPTION

In order to make the purposes, technical solutions and advantages of thepresent disclosure more clear, the embodiments of the present disclosurewill be further described in detail below with reference to theaccompanying drawings.

FIG. 1 is a schematic structural diagram of an array substrate accordingto an embodiment of the present disclosure. The array substrate maycomprise:

a base substrate 11.

The base substrate 11 has the following arrays provided thereon: a array12 of first thin film transistors configured to perform a displaycontrol function and including a plurality of first thin filmtransistors 121, a signal line array 13 including a plurality of signallines 131, a photosensor array 14 including a plurality of photosensors141 and a receiving line array 15 including a plurality of receivinglines 151, wherein each first thin film transistor 121 in the array 12of first thin film transistors is connected to one signal line 131 inthe signal line array 13. When the signal lines in the signal line arrayare arranged longitudinally (the longitudinal arrangement means that anarrangement direction of the plurality of signal lines on the basesubstrate 11 is a longitudinal direction, and the arrangement directionmay refer to an arrangement direction of the plurality of signal linesin the signal line array, which may be perpendicular to a lengthwisedirection of the signal lines), each row of first thin film transistors121 may be connected to the same signal line 131, and each column offirst thin film transistors 121 may be connected to different signallines 131. When the signal lines in the signal line array are arrangedlaterally, each row of first thin film transistors 121 may be connectedto different signal lines 131, and each column of first thin filmtransistors 121 may be connected to the same signal line 131. In anembodiment, the signal line array 13 may be a gate line array includinga plurality of gate lines.

Each photosensor 141 in the photosensor array 14 is connected to onesignal line in the signal line array 13, and a signal line connected toeach photosensor is used to control the photosensor.

Each photosensor 141 in the photosensor array 14 is connected to onereceiving line in the receiving line array 15, which is used to receiveoptical information acquired by the photosensor array 14.

In summary, the array substrate according to the embodiment of thepresent disclosure reduces lines to be provided and increases anaperture ratio of the array substrate by sharing the signal linesbetween the photosensors and the thin film transistors for displaycontrol. The present disclosure solves the problem of providing a largenumber of lines and devices in the array substrate in the related artwhich may affect the aperture ratio of the array substrate. The presentdisclosure achieves an effect that the photosensors can be provided onthe array substrate in a case where a small number of lines areprovided.

Further, as shown in FIG. 2-1, illustrated is a schematic structuraldiagram of another array substrate according to an embodiment of thepresent disclosure, which adds more preferable components on the basisof the array substrate shown in FIG. 1. Thereby, the array substrateaccording to the embodiment of the present disclosure has betterperformance.

In an embodiment, the array substrate 10 further comprises a data linearray 16 including a plurality of data lines 161 provided thereon. Thearray substrate is divided by the plurality of signal lines 131 and theplurality of data lines 161 into a plurality of sub-pixel regions, whichmay be rectangular, square or in another shape.

A number of the photosensors in the photosensor array 14 is less than orequal to a number of the sub-pixel regions.

In an embodiment, the photosensor array 14 comprises a preset number ofphotosensors. That is, the number of the photosensors may be presetdirectly.

The photosensor array 14 may be formed by vapor deposition, sputteringor spin coating in combination with a photolithography process or alaser process.

In an embodiment, in the plurality of sub-pixel regions, one photosensoris provided in every n sub-pixel regions along at least one of anarrangement direction of the data lines 161 and an arrangement directionof the signal lines 131, where n is an integer greater than or equal to2. That is, the photosensors may be evenly distributed in variousregions of the array substrate, so that the number of the photosensorscan be reduced in a case where there is a photosensor in each region.

In an embodiment, in the array 12 of first thin film transistors, thefirst thin film transistors 121 may be double-gate-type polysilicon thinfilm transistors. The polysilicon thin film transistors have a fasterswitch speed than that of the thin film transistors in the related art.

When the sub-pixel regions in the array substrate are all rectangular,and long sides of the sub-pixel regions are parallel to the signal lines131, an arrangement direction A of the receiving lines 151 in thereceiving line array 15 is parallel to an arrangement direction B of thedata lines 161 in the data line array 16. In this way, a length of thereceiving lines in the receiving line array 15 can be reduced, therebyreducing an area occupied by the receiving lines on the array substrateand increasing the aperture ratio of the array substrate. The samecolumn of photosensors may be connected to the same receiving line, andthe same row of photosensors may be connected to the same signal line,so that the photosensor array can be controlled in a similar manner tothat of controlling the array of first thin film transistors. That is,electrical signals transmitted by various photosensors may be acquiredrespectively by powering on the signal lines progressively.

In FIG. 2-1, each photosensor in the photosensor array may occupy anarea of 1 square microns to 10,000 square microns on the arraysubstrate.

In an embodiment, the photosensor array 14 is located in an openingregion of the array substrate, and there is no light blocking structureabove the photosensors in the photosensor array 14, such as a BlackMatrix (BM) and the like in a color film substrate.

Meanings of other signs in FIG. 2-1 can be known with reference to FIG.1, and details thereof will not be described here again.

When the sub-pixel regions in the array substrate are all rectangular,and short sides of the sub-pixel regions are parallel to the signallines 131, the array substrate 10 according to the embodiment of thepresent disclosure may be as shown in FIG. 2-2, wherein the arrangementdirection A of the receiving lines 151 in the receiving line array 15 isparallel to an arrangement direction C of the signal lines 131 in thesignal line array 13. In this way, the length of the receiving lines inthe receiving line array 15 can also be reduced, thereby reducing thearea occupied by the receiving lines on the array substrate andincreasing the aperture ratio of the array substrate. Meanings of othersigns in FIG. 2-2 can be known with reference to FIG. 2-1, and detailsthereof will not be described here again.

As shown in FIG. 2-3, the array substrate further comprises a lens array17 including a plurality of lenses 171 provided thereon. The lens array17 is located on a side of the photosensor array 14 which is away fromthe base substrate 11, and the lenses in the lens array 17 are inone-to-one correspondence with all or a part of the photosensors in thephotosensor array 14. The lenses in the lens array 17 may be formed byan imprinting, etching or grinding process, and a material of the lensesmay comprise an organic resin or a silicon-based organic resin or glass.The lens array 17 is capable of increasing the light utilization of thephotosensor array 14.

In an embodiment, each lens in the lens array 17 is a Fresnel lens whichis capable of reducing a thickness of the lens array 17. The Fresnellens, also known as threaded lens, is a sheet made of a polyolefinmaterial or glass through injection molding. A surface of the lens issmooth on one side and have concentric circles carved from small tolarge on the other side. The concentric circles are designed accordingto requirements for light interference, light disturbance, relativesensitivity and a receiving angle.

In an embodiment, as shown in FIG. 2-4, illustrated is a schematicstructural diagram of another array substrate according to theembodiment of the present disclosure, wherein each lens in the lensarray 17 is a micro-lens array including a plurality of micro-lensesarranged in an array, which can increase the light utilization andreduce a thickness of the lenses.

Depending on different focal lengths of the lenses in the lens array 17,the photosensor array 14 can implement different functions such asfingerprint recognition, copying and scanning, image recognition, facerecognition, light detection, and distance detection and the like. As anexample, when the focus of the lenses in the lens array 17 is located onan outer surface of a light exiting side of the array substrate, thephotosensor array 14 can be used to implement functions such asfingerprint recognition and image recognition and the like, when thefocal length of the lenses in the lens array 17 is 20 cm to 50 cm, thelens array 17 can be used to implement functions such as facerecognition and the like, and when the focal length of the lenses in thelens array 17 is greater than 1 m, the lens array 17 can be used toimplement functions such as light detection and distance detection andthe like.

In addition, the lenses in the lens array 17 may also be provided as afilter structure through which only light with a preset wavelength canpass, so as to further increase the accuracy of the photosensor array14.

The array substrate according to the embodiment of the presentdisclosure may be a liquid crystal array substrate, an Organic LightEmitting Diode (OLED) array substrate, a Quantum dot Light EmittingDiode (QLED) array substrate, or another array substrate composed ofmicro-display structures.

As shown in FIG. 2-5, illustrated is a schematic structural diagram ofanother array substrate according to an embodiment of the presentdisclosure, wherein the lens array 17 is a liquid crystal lens arrayincluding a plurality of liquid crystal lenses, and any one of theliquid crystal lenses 171 in the lens array 17 comprises a liquidcrystal layer 171 a and a control electrode 171 b. The control electrode171 b may be provided in the liquid crystal layer 171 a, or may also beprovided on both sides or either side of the liquid crystal layer 171 a,and the control electrode 171 b may be used to control a focal length ofany one of the liquid crystal lenses. The control electrode 171 b maygenerate an electric field in the liquid crystal layer, and liquidcrystal in the liquid crystal layer 171 a may be deflected by theelectric field, thereby achieving the effect of changing the focallength of the liquid crystal lens. The control electrode 171 b may bemade of a transparent material such as indium tin oxide and the like.

When the lens array 17 is a liquid crystal lens array, differentfunctions can be realized by changing the focal length. The functionswhich can be realized can be known with reference to the array substrateshown in FIG. 2-4.

In an embodiment, the lens array 17 is provided on the light exitingside L of the array substrate 10. The lens array 17 is provided on thelight exiting side L of the array substrate 10, which can preventelectrodes in the lens array 17 from affecting devices (such as liquidcrystal layers) in the array substrate 10 when the lens array 17 isprovided on the array substrate 10.

In addition, the lens array 17 may further comprise an entire liquidcrystal layer covering the light exiting side of the array substrate,and each of the liquid crystal lenses may be located in the liquidcrystal layer.

As shown in FIG. 2-6, illustrated is a schematic structural diagram ofanother array substrate according to an embodiment of the presentdisclosure. Here, any one of the photosensors 141 in the photosensorarray 14 comprises a second thin film transistor 1411 and aphotoelectric converter 1412. The second thin film transistor 1411comprises an active layer 207, a first electrode 1411 b, a secondelectrode 1411 c, and a gate 1411 d.

The gate 1411 d is connected to a preset signal line in the signal linearray (such as the signal line array 13 in FIG. 2-1), the firstelectrode 1411 b is connected to a positive electrode + of thephotoelectric converter 1412, the second electrode 1411 c is connectedto a preset receiving line in the receiving line array (such as thereceiving line array 15 in FIG. 2-1), and a negative electrode − of thephotoelectric converter 1412 is connected to the gate 1411 d. The presetsignal line and the preset receiving line may be a signal line and areceiving line in a sub-pixel region where the photosensor 141 islocated.

A material of the photoelectric converter 1412 may comprisesemiconductor materials such as a quantum dot material, a dopedsilicon-based material, Gallium Arsenide (GaAs), Gallium AluminumArsenide (GaAlAs), Indium Phosphide (InP), Cadmium Sulfide (CdS), andCadmium Telluride (CdTe) and the like. All or a part of thephotoelectric converters 1412 may have a photovoltaic effect for lightwith a wavelength of 300 nm to 2000 nm.

In an embodiment, the active layer 207 is provided on the base substrate11.

In an embodiment, a base layer 201 is provided between the active layer207 and the base substrate 11. The base layer 201 is used to protect theactive layer 207.

A first insulating layer 202 is provided on the active layer 207, asecond insulating layer 203 is provided on the first insulating layer202, and a third insulating layer 204 is provided on the secondinsulating layer 203.

The first insulating layer 202 and the second insulating layer 203 eachhave a first via hole provided therein, the second insulating layer 203has a second via hole provided therein, and the first insulating layer202, the second insulating layer 203, and the third insulating layer 204each have a third via hole provided therein. Orthogonal projections ofthe first via hole, the second via hole and the third via hole on thebase substrate 11 are at least partly overlapped with an orthogonalprojection of the active layer 207 on the base substrate 11.

In an embodiment, the orthogonal projections of the first via hole, thesecond via hole and the third via hole on the base substrate 11 are allwithin a range of the orthogonal projection of the active layer 207 onthe base substrate 11.

The gate 1411 d is provided in the second via hole, the photoelectricconverter 1412 is provided on the gate 1411 d, and the negativeelectrode − of the photoelectric converter 1412 is in contact with thegate 1411 d.

The first electrode 1411 b is provided on the second insulating layer203, and the first electrode 1411 b is in contact with the positiveelectrode of the photoelectric converter 1412, and is electricallyconnected to the active layer 207 through the first via hole.

The second electrode 1411 c is provided in the third via hole, and thesecond electrode 1411 c is electrically connected to the active layer207.

The preset receiving line 151 is provided on the third insulating layer204, and the preset receiving line 151 is electrically connected to thesecond electrode 1411 c through the third via hole.

Preferably, the second electrode 1411 c and the preset receiving line151 are made of the same material and are formed by the same patterningprocess to simplify the process.

It should be illustrated that an order in which various structures inFIG. 2-6 are formed and a manner for forming various structures in FIG.2-6 are not limited in the embodiment of the present disclosure.

In an embodiment, the first electrode 1411 b is made of a transparentconductive material (such as indium tin oxide). When the first electrode1411 b is made of a transparent conductive material, the first electrode1411 b may be covered on the positive electrode + of the photoelectricconverter 1412, so that a contact area of the first electrode 1411 b andthe positive electrode + can be increased without blocking light fromentering the photoelectric converter 1412, thereby increasing thephotoelectric conversion efficiency of the photoelectric converter 1412;and/or the negative electrode − of the photoelectric converter 1412 maybe covered on the gate 1411 d, so that a contact area of the gate 1411 dand the negative electrode − can be increased, thereby increasing thephotoelectric conversion efficiency of the photoelectric converter 1412.

In an embodiment, an ohmic contact layer 205 is further provided at alocation where the first electrode 1411 b and/or the second electrode1411 c are in contact with the active layer 207. The ohmic contact layer205 may be provided in the same layer as that of the active layer 207and may be in contact with the active layer 207, and the first electrode1411 b and the second electrode 1411 c may be in contact with the top ofthe ohmic contact layer 205, respectively. The ohmic contact layer 205enables the first electrode 1411 b and the second electrode 1411 c to bein ohmic contact with the active layer, thereby reducing a contactresistance between the active layer 207 and the first electrode 1411 band a contact resistance between the active layer 207 and the secondelectrode 1411 c. A material of the ohmic contact layer 205 can be knownwith reference to the related art.

As shown in FIG. 2-7, illustrated is a circuit structure diagram of thearray substrate shown in FIG. 2-6, wherein 40 is a display structure,and the photoelectric converter 1412 may be equivalent to a diode in thecircuit, which has a positive electrode + connected to the firstelectrode 1411 b, a negative electrode − connected to the gate 1411 d,and a second electrode 1411 c connected to the receiving line 151. 131is a signal line.

As shown in FIG. 2-8, illustrated is a response curve of thephotoelectric converter in the embodiment of the present disclosure tocurrent and a voltage. It can be seen from the curve that an opencircuit voltage and closed circuit current of the photoelectricconverter are zero.

In summary, the array substrate according to the embodiment of thepresent disclosure reduces lines to be provided and increases anaperture ratio of the array substrate by sharing the signal linesbetween the photosensors and the thin film transistors for displaycontrol. The present disclosure solves the problem of providing a largenumber of lines and devices in the array substrate in the related artwhich may affect the aperture ratio of the array substrate. The presentdisclosure achieves an effect that the photosensors can be provided onthe array substrate in a case where a small number of lines areprovided.

FIG. 3-1 is a flowchart of a method for controlling an array substrateaccording to an embodiment of the present disclosure, which is used inthe array substrate according to various embodiments described above.The method comprises the following steps.

In step 301, the photosensors in the photosensor array are controlledthrough the signal lines in the signal line array to be turned on.

The photosensors in the photosensor array may be controlled throughvoltages in the signal lines to be turned on when the array substrate isused for display. An execution body in the embodiment of the presentdisclosure may be a control circuit external to the array substrate.

In the embodiment of the present disclosure, the photosensors may alsobe turned on by applying voltages to the signal lines when the arraysubstrate is not used for display.

In addition, the method according to the embodiment of the presentdisclosure may also control the photosensors when the array substrate isnot used for display.

In step 302, electrical signals generated by the photosensors in thephotosensor array are received through the receiving lines in thereceiving line array.

When the electrical signals on the signal lines are sequentiallytransmitted to the respective rows of signal lines, the control circuitmay sequentially acquire the electrical signals generated by therespective rows of photosensors.

In step 303, optical information is acquired according to the electricalsignals.

Here, any one of the photosensors in the photosensor array comprises asecond thin film transistor and a photoelectric converter. The secondthin film transistor comprises an active layer, a first electrode, asecond electrode, and a receiving line, wherein the gate is connected toa preset signal line in the signal line array, the first electrode isconnected to a positive electrode of the photoelectric converter, thesecond electrode is connected to a preset receiving line in thereceiving line array, and a negative electrode of the photoelectricconverter is connected to the preset signal line.

As shown in FIG. 3-2, this step may comprise the following threesub-steps.

In sub-step 3031, at least one valid electrical signal is screened outfrom the electrical signals acquired through various receiving lines inthe receiving line array, wherein a voltage of the valid electricalsignal is greater than that of a corresponding signal line.

An external control circuit may comprise a detection circuit and aninformation acquisition circuit, wherein the detection circuit may beconfigured to judge whether a voltage of an electrical signal receivedby each receiving line is greater than a voltage of a correspondingsignal line, and determine an electrical signal with a voltage greaterthan a voltage of a signal line in a sub-pixel region where thereceiving line is located as a valid electrical signal. This is becausethe voltage of the electrical signal received by the receiving line isequal to a sum of the voltage of the signal line and a voltage intowhich the photoelectric converter converts light (the voltage has thesame direction as that of the voltage of the signal line), and if thesum is less than the voltage of the signal line, it indicates that thecircuit may be faulty, the electrical signal received by the receivingline is invalid, and at this time, the receiving line may be detectedagain to confirm a specific problem.

The detection circuit may transmit the valid electrical signal to theinformation acquisition circuit.

In sub-step 3032, a standard value φ of each of the at least one validelectrical signal is acquired according to a preset formula.

The information acquisition circuit may acquire a standard value φ ofeach of the at least one valid electrical signal according to a presetformula. The preset formula may be

${\varphi = \frac{V_{p} - V_{g}}{V_{g}}},$where V_(p) is the voltage of the effective signal and V_(g) is thevoltage of the signal line. The preset formula is only illustrative, andthe standard value of each valid electrical signal may also be acquiredaccording to other formulas, which is not limited in the embodiment ofthe present disclosure.

The information acquisition circuit may store the standard value of eachvalid electrical signal.

In sub-step 3033, optical information is acquired according to thestandard value of each valid electrical signal.

After standard values of all the valid electrical signals in thephotosensor array are acquired, the optical information may be acquiredaccording to the standard values. As an example, the optical informationmay be acquired according to position information of photosensorscorresponding to the standard values, pixel colors of the photosensorscorresponding to the standard values, and sizes of the standard valuesand the like, to implement various functions. The method for acquiringthe optical information according to the electrical signals can be knownwith reference to the related art, and details thereof will not bedescribed here again.

As an example, in the embodiment of the present disclosure, when thearray substrate is used for display, for any column of sub-pixelregions, level signals on signal lines, data lines, and receiving linesin n^(th) and (n+1)^(th) rows of sub-pixel regions may be shown in FIG.3-3. It can be seen that when there are electrical signals on the signallines, corresponding photoelectric converters are turned on, thereceiving lines may receive the electrical signals, and adjacent tworows of photoelectric converters may sequentially acquire the electricalsignals in an order of powering on the signal lines. In addition, whenthe array substrate is not used for display, there may not be levelsignals on the data lines in FIG. 3-3.

In summary, the method for controlling an array substrate according tothe embodiment of the present disclosure reduces lines to be providedand increases an aperture ratio of the array substrate by turning on thephotoelectric converters through the signal lines. The presentdisclosure solves the problem of providing a large number of lines anddevices in the array substrate in the related art which may affect theaperture ratio of the array substrate. The present disclosure achievesan effect that the photosensors can be provided on the array substratein a case where a small number of lines are provided.

The embodiments of the present disclosure further provide a method formanufacturing an array substrate, which is used to manufacture any ofthe array substrates shown in FIG. 1 and FIGS. 2-1 to 2-6.

The embodiments of the present disclosure further provide a displaydevice comprising any of the array substrates shown in FIG. 1 and FIGS.2-1 to 2-6.

The term “and/or” in the present disclosure is merely an associationrelationship for describing associated objects, indicating that theremay be three relationships, for example, A and/or B, which may indicateonly A, both A and B, and only B. In addition, the character “/” hereingenerally indicates that the associated objects have an “or”relationship.

It is pointed out that in the accompanying drawings, sizes of layers andregions may be exaggerated for clarity of illustration. It can also beunderstood that when an element or layer is referred to as being “on”another element or layer, it may be directly on the other element orthere may be an intermediate layer. In addition, it can be understoodthat when an element or layer is referred to as being “under” anotherelement or layer, it may be directly under the other element or theremay be more than one intermediate layer or element. In addition, it canalso be understood that when a layer or element is referred to as being“between” two or two elements, it may be a single layer between twolayers or elements, or there may be more than one intermediate layer orelement. Like reference signs indicate like elements throughout.

In the present disclosure, the terms “first,” “second,” and “third” areused for descriptive purposes only and are not to be construed asindicating or implying relative importance. The term “plurality” refersto two or more, unless specifically defined otherwise.

It can be understood by those of ordinary skill in the art that all orpart of the steps for implementing the above embodiments may beimplemented by hardware, or may be implemented by programs instructingrelated hardware, wherein the programs may be stored in a computerreadable storage medium, which may be a read only memory, a magneticdisk or an optical disk and the like.

The above description is only the preferred embodiment of the presentdisclosure, and is not intended to limit the present disclosure. Anymodifications, equivalent substitutions, improvements, and the like.Within the spirit and principles of the present disclosure should beincluded in the protection scope of the present disclosure.

We claim:
 1. An array substrate, comprising: a base substrate; and anarray of first thin film transistors, a signal line array, a photosensorarray and a receiving line array, each provided on the base substrate,wherein each first thin film transistor in the array of first thin filmtransistors is connected to one signal line in the signal line array,each photosensor in the photosensor array is connected to one signalline in the signal line array and one receiving line in the receivingline array, and lenses are provided on at least one photosensor in thephotosensor array on a side thereof away from the base substrate, so asto form a lens array, each photosensor in the photosensor arraycomprises a second thin film transistor and a photoelectric converter,wherein the second thin film transistor has a gate connected to thesignal line and a negative electrode of the photoelectric converter, afirst electrode connected to a positive electrode of the photoelectricconverter, and a second electrode connected to the receiving line, thesecond thin film transistor comprises an active layer, the basesubstrate has a base layer, the active layer, a first insulating layer,a second insulating layer and a third insulating layer provided thereonin an order from bottom to top, wherein the first insulating layer andthe second insulating layer have a first via hole provided therein, thesecond insulating layer has a second via hole provided therein, thefirst insulating layer, the second insulating layer, and the thirdinsulating layer have a third via hole provided therein, and orthogonalections of the first via hole, the second via hole and the third viahole on the base substrate are ail within a range of an orthogonalprojection of the active layer on the base substrate, the gate isprovided in the second via hole, and the photoelectric converter isprovided on the gate, the first electrode is provided on the secondinsulating layer and is electrically connected to the active layerthrough the first via hole, the second electrode is provided in thethird via hole and is electrically connected to the active layer, andthe receiving line is provided on the third insulating layer and iselectrically connected to the second electrode through the third viahole, wherein the receiving line and the second electrode are formed bythe same patterning process.
 2. The array substrate according to claim1, wherein each of the lenses is selected from a micro-lens array, aFresnel lens or a liquid crystal lens.
 3. The array substrate accordingto claim 2, wherein in a case that the lenses are liquid crystal lenses,each of the liquid crystal lenses comprises a liquid crystal layer and acontrol electrode configured to control a focal length of the liquidcrystal lens.
 4. The array substrate according to claim 3, wherein theliquid crystal lenses are provided on a light exiting side of the arraysubstrate.
 5. A display device, comprising the array substrate accordingto claim
 2. 6. The array substrate according to claim 1, wherein thefirst electrode is made of a transparent conductive material.
 7. Thearray substrate according to claim 1, wherein an ohmic contact layer isfurther formed at a position where at least one of the first electrodeand the second electrode is in contact with the active layer.
 8. Thearray substrate according to claim 1, wherein the base substrate furthercomprises a data line array provided thereon, wherein an arrangementdirection of receiving lines in the receiving line array is parallel toan arrangement direction of data lines in the data line array.
 9. Thearray substrate according to claim 8, wherein the array substrate isdivided by the signal lines and the data lines into a plurality ofsub-pixel regions in a crisscross manner, wherein a number ofphotosensors in the photosensor array is less than or equal to a numberof the sub-pixel regions.
 10. The array substrate according to claim 9,wherein a photosensor is provided in every n sub-pixel regions along atleast one of the arrangement direction of the data lines and thearrangement direction of the signal lines, where n is an integer greaterthan or equal to
 2. 11. The array substrate according to claim 1,wherein the base substrate further comprises a data line array providedthereon, wherein an arrangement direction of receiving lines in thereceiving line array is parallel to an arrangement direction of signallines in the signal line array.
 12. The array substrate according toclaim 11, wherein the array substrate is divided by the signal lines andthe data lines into a plurality of sub-pixel regions in a crisscrossmanner, wherein a number of photosensors in the photosensor array isless than or equal to a number of the sub-pixel regions.
 13. The arraysubstrate according to claim 12, wherein a photosensor is provided inevery n sub-pixel regions along at least one of the arrangementdirection of the data lines and the arrangement direction of the signallines, where n is an integer greater than or equal to
 2. 14. The arraysubstrate according to claim 1, wherein the photosensor array is locatedin an opening region of the array substrate.
 15. A method forcontrolling the array substrate according to claim 1, comprising:controlling, through the signal lines, the photosensors to be turned on;receiving, through the receiving lines, electrical signals generated bythe photosensors; and acquiring optical information according to theelectrical signals.
 16. The method according to claim 15, wherein thestep of controlling, through the signal lines, the photosensors to beturned on comprises: controlling, through voltages in the signal lines,the photosensors to be turned on while controlling, through thevoltages, the array substrate to be used for display.
 17. The methodaccording to claim 16, wherein the step of acquiring optical informationaccording to the electrical signals comprises: screening out at leastone valid electrical signal from the electrical signals acquired throughvarious receiving lines, wherein a voltage of the valid electricalsignal is greater than a voltage of a corresponding signal line;acquiring a standard value φ of each valid electrical signal accordingto the following formula: ${\varphi = \frac{V_{p} - V_{g}}{V_{g}}},$where V_(p) is the voltage of the valid signal and V_(g) is the voltageof the signal line; and acquiring the optical information according tothe standard value of the valid electrical signal.
 18. A display device,comprising the array substrate according to claim 1.